Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China.
Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China.
Bioresour Technol. 2020 Nov;316:123927. doi: 10.1016/j.biortech.2020.123927. Epub 2020 Jul 29.
The effects of mix planting on the functions of plants, microorganisms, and their interactions were studied in a CW planted with Phragmites australis and Typha orientalis over six years. Findings show notable competition among plant species, with excessive overgrowth of the dominant species (P. australis) over T. orientalis. The excessive outcompeting by P. australis resulted in significantly higher plant density and biomass of 20.1 times and 11.2 times, respectively than that of T. orientalis. Interspecific competition appeared to considerably intensify plants contributions to nitrogen and phosphorus removal, which increased from circa 9% in the first year up to 42% in the sixth year. High-throughput pyrosequencing and network analyses demonstrated that the dominant species stands harbor diverse bacterial communities that could enhance the wetland performance through carbon degradation, nutrient cycling, and supporting plant growth. These results provide useful insights into the interactive effects of plants and bacteria in polyculture constructed wetlands.
六年期间，通过混种芦苇和东方香蒲的人工湿地，研究了植物、微生物及其相互作用的功能。研究结果表明，植物种间存在明显的竞争，优势物种（芦苇）过度生长，对东方香蒲形成排挤。芦苇的过度竞争导致其植物密度和生物量分别比东方香蒲高 20.1 倍和 11.2 倍。种间竞争似乎显著增强了植物对氮磷的去除作用，从第一年的约 9%增加到第六年的 42%。高通量焦磷酸测序和网络分析表明，优势物种种群中蕴藏着丰富的细菌群落，这些群落通过碳降解、养分循环和支持植物生长，提高湿地性能。这些结果为多物种人工湿地中植物和细菌的相互作用提供了有用的见解。
